Table 2 Total polyphenol concentration in grape skin extracts

Variety	Colour	Organic	Conventional
		Total polyphenols content	Total polyphenols content
		(mg GAE/kg sample)	(mg GAE/kg sample)
Aromat de Iaşi	white	220.38 ± 14.21^g	228.84 ± 6.23^h
Traminer roz	white	219.33 ± 4.02^g	330.37 ± 2.36^g
Riesling italian	white	423.43 ± 10.36^e	436.12 ± 11.02^e
Feteasca regală	white	579.94 ± 11.12^d	575.71 ± 9.06^c
Muscat Ottonel	white	631.38 ± 21.0^c	541.27 ± 32.3^d
Timpuriu de Cluj	white	331.34 ± 3.52^f	380.62 ± 23.5^f
Napoca	blue-black	1341.37 ± 21.1^a	1231.38 ± 21.0^a
Chasselas doré	white	163.26 ± 3.66^h	148.47 ± 1.69ⁱ
Muscat Hamburg	blue-black	978.08 ± 12.8^b	953.04 ± 10.9^b
LSD 0.05		12.93	19.43

Values are mean ± SD, n = 3; in each column, mean values with different letters are significantly different at P < 0.05.

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